UPDATE: According to New Zealand Prime Minister John Key, at least 2 people have been killed following the deadly earthquake.
A powerful 7.8-magnitude earthquake has struck New Zealand.
The relatively shallow quake of 10km deep, happened just after midnight Sunday near the city of Christchurch.
Some minor damage was reported in the capital, Wellington, about 200km away.
Authorities say the quake generated a tsunami with first waves hitting the South Island.
Residents are being warned to move to higher ground.
As of Sunday morning, there was minor damage and no injuries reported.
Meanwhile, a 6.2-magnitude earthquake struck Argentina just after 8am local time.
It was centered in La Rioja province, about 26km north of the community of Chilecito.
The quake was about 100km deep.
There are no immediate reports of damage or injuries.